MESON Chess Problem Database

Problem Display
PID: 7324 (q1n5/1NQ5/p1p5/3p1p2/P1k1p2R/2p5/b1N1K3/1r1BB3 w - - 0 1)

Lamba, Stelian

Problemas, 1999

q1n5/1NQ5/p1p5/3p1p2/P1k1p2R/2p5/b1N1K3/1r1BB3

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rb3
      • 2.Qxc6#
    • 1...Bb3
      • 2.Qxc6#
    • 1...d4
      • 2.Qf7#
    • 1...c5
      • 2.Sa5#
  • Tries
    • 1.Sa3+?
      • 1...Kd4
        • 2.Bf2#
        • 2.Qg7#
      • 1...Kb4!
    • 1.Se3+?
      • 1...Kd4
        • 2.Qg7#
      • 1...Kb4!
    • 1.Rxe4+?
      • 1...Kb3
        • 2.Rb4#
      • 1...dxe4
        • 2.Qf7#
      • 1...d4
        • 2.Qf7#
      • 1...fxe4!
    • 1.Qg3?
      • threat
        • 2.Qxc3#
      • 1...d4
        • 2.Qg8#
      • 1...Rb3
        • 2.Qd3#
      • 1...Kb3!
    • 1.Qe5?
      • threat
        • 2.Qxc3#
      • 1...Rb3
        • 2.Qd4#
      • 1...d4
        • 2.Sa5#
        • 2.Qe6#
      • 1...Kb3!
    • 1.Qg7?
      • threat
        • 2.Qxc3#
      • 1...d4
        • 2.Qf7#
        • 2.Qg8#
      • 1...Rb3
        • 2.Qd4#
      • 1...Kb3!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qxc3#
      • 1...Kb3
        • 2.Qb4#
      • 1...Rb3
        • 2.Qc5#
      • 1...Rb4
        • 2.Qxb4#
      • 1...d4
        • 2.Sa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(a);SBLOCK::QAR2(H),XP(i)
    • B(b);SBLOCK::QAR2(H),XP(i)
    • P(f);N_SPINP(e),OGATEB,P_SPINP(i)::QAB(H)
    • P(i);::S(G)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • K(d);N_SPINP(e),P-FLIGHT,P_SPINP(c)
    • Try
      • S(C);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB(H)
      • Refutation
        • K(d);N_SPINP(e),P-FLIGHT,P_SPINP(c)
    • Try
      • R(F);CHECK,P_PINP(i),XP(e)
      • Vars
        • K(d);N_SPINP(i),OGATE,S_FLIGHT::R1(F)
        • P(f);S_CUTP(g),XR(F)::QAB(H)
        • P(f);N_SPINP(i),P_SPINP(f),S_CUTP(g)::QAB(H)
      • Refutation
        • P(g);XR(F)
    • Try
      • Q(H);
      • Threat
        • QAR1(H),XP(c)
      • Vars
        • P(f);N_SPINP(e),OGATEB::QAB(H)
        • R(a);SBLOCK::QAB1(H)
      • Refutation
        • K(d);N_SPINP(e),P_SPINP(c),S_FLIGHT
    • Try
      • Q(H);
      • Threat
        • QAR1(H),XP(c)
      • Vars
        • R(a);SBLOCK::QAR1(H)
      • Refutation
        • K(d);N_SPINP(e),S_FLIGHT
    • Try
      • Q(H);
      • Threat
        • QAR1(H),XP(c)
      • Vars
        • R(a);SBLOCK::QAR1(H)
      • Refutation
        • K(d);N_SPINP(e),S_FLIGHT
  • Actual
    • Q(H);
    • Threat
      • QAR1(H),XP(c)
    • Vars
      • K(d);N_SPINP(e),S_FLIGHT::QAR1(H)
      • R(a);SBLOCK::QAR1(H)
      • R(a);N_GUARD::QAR1(H),XR(a)
      • P(f);N_SPINP(e),SBLOCK::S(C)
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